<template>
  <div class="cmt-container">
    <h3>发表评论</h3>
    <div class="hr"></div>
    <textarea maxlength="120" placeholder="请输入要BB的内容" class="cmt-area" v-model="msg"></textarea>
    <mt-button type="primary" size="large" @click="addCmt">点击发表</mt-button>
    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="item.id">
        <div
          class="cmt-title"
        >第{{ i + 1}}楼&nbsp;&nbsp;用户:{{ item.user_name }}&nbsp;&nbsp;发表时间:{{ item.add_time | dateFormat}}</div>
        <div
          class="cmt-body"
        >{{ item.content === 'undefined' ? '此用户很懒,什么都没说' : item.content === "" ? '此用户更懒 , 什么都没发' : item.content }}</div>
      </div>
    </div>
    <mt-button type="danger" size="large" plain @click="showMore">加载更多</mt-button>
  </div>
</template>
<script>
import { Toast } from "mint-ui";
export default {
  data() {
    return {
      pageIndex: 1, // 默认展示第一页数据
      comments: [], // 所有的评论数据
      msg: ""
    };
  },
  methods: {
    getComments() {
      this.$http
        .get("api/getcomments/" + this.id + "?pageindex=" + this.pageIndex)
        .then(result => {
          if (!result.body.status) {
            if (this.comments.length) {
              this.comments = this.comments.concat(result.body.message);
            } else {
              this.comments = result.body.message;
            }
          } else {
            Toast("获取数据失败");
          }
        });
    },
    showMore() {
      this.pageIndex++;
      this.getComments();
    },
    addCmt() {
      if (this.msg.trim().length === 0) {
        Toast("评论内容不能为空");
      }
      // 发表评论
      this.$http
        .post("api/postcomment/" + this.id, {
          content: this.msg.trim()
        })
        .then(result => {
          if (result.body.status === 0) {
            this.comments.unshift({
              add_time: Date.now(),
              content: this.msg,
              user_name: "匿名用户"
            })
          } else {
            Toast("发表评论失败")
          }
          this.msg = ""
        })
    }
  },
  created() {
    this.getComments();
  },
  props: ["id"]
};
</script>
<style lang="scss" scoped>
.cmt-container {
  h3 {
    font-size: 18px;
  }
  .cmt-area {
    font-size: 14px;
    outline: none;
    height: 85px;
    margin: 0;
  }
  .cmt-list {
    margin: 5px 0;
    .cmt-item {
      font-size: 13px;
      .cmt-title {
        background-color: rgb(158, 157, 157);
        line-height: 30px;
      }
      .cmt-body {
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}
</style>
